I was wondering if gloves are acceptable for rings and bars. I know it's not really the way to do it but my hands don't have the strength to keep holding on. An example is a back roll which I do usually can't finish the reps cause my hands give out. I'm just wondering if its absolutely not acceptable whatsoever or If its just like whatever. I know some people use gloves in crossfit but that's not even the same but still.

It's not like it's punishable by death but generally no, you wouldn't wear gloves. If your grip is letting you down, train your grip. Some good ways to train grip are rope climbs or pull-ups with a towel.